<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>button-counter</title>
    <script src="https://cdn.bootcss.com/vue/2.6.10/vue.js"></script>
</head>
<body>
    <div id="app">
        <button-counter></button-counter>
        <button-counter></button-counter>
        <button-counter></button-counter>
    </div>
    <script>
        var buttonCounter2Data = {
            count: 0
        };
        Vue.component('button-counter', {
            data: function(){
                return buttonCounter2Data;
            },
            template: '<button v-on:click="count++">clicked {{ count }} times.</button>'
        });
        var app = new Vue({
            el: '#app'
        });
    </script>
</body>
</html>
